在家中接受被动吸烟的儿童罹患呼吸道感染和哮喘的风险增高，肺换气量减低。如果肺功能缺陷是永久性的，儿童期被动吸烟可能是支气管炎的原因之一。该研究评价被动吸烟者的一秒钟用力呼气量（ＦＥＶ１）与母亲吸烟的关系。病人与方法对对２５８例男女被动吸烟者用Ｆｌｅｉｓｈ Children receiving passive smoking at home have an increased risk of respiratory infections and asthma, and reduced lung ventilation. If pulmonary function defects are permanent, passive smoking in childhood may be one of the causes of bronchitis. The study evaluated passive smoker’s forced expiratory volume per second (FEV1) and maternal smoking relationship. Patients and Methods Pairs of 258 male and female passive smokers with Fleish